Mass Effect 3: Leviathan is releasing on Aug. 28 for download on PlayStation Network and Xbox Live, according to a statement released by Bioware on the game's official site.

"We are very pleased to officially announce that the Mass Effect 3 Leviathan single-player DLC will be released on August 28th, 2012 for PS3, Xbox 360, and PC," Bioware said. "Please note that on PlayStation 3 in Europe, it will be available on August 29th."

Leviathan is the first story-driven, single player DLC to be made available since Mass Effect 3 Extended Cut and expands upon the events of Mass Effect 3 before the game's closing sequence. The download is coming with extras like compelling new characters, powerful weapons and unique upgrades.

Players will be on a journey to discover more about the origins of the reapers after hearing rumors of a weapon strong enough to defeat the evil machines. This new journey takes Commander Shepard across the galaxy to unravel the mystery that surrounds the fabled Leviathan.

The recently released Extended Cut DLC for Mass Effect 3 hinted that the Leviathan dlc would add extra dialogue to the ending, this was found in code pulled from the Extended-ending's download. Also, in a recent interview Bioware producer Michael Gamble hinted that the dlc could change the outcome of the ending by providing gamers with a better understanding of the games ending.

"Mass Effect 3: Leviathan is our first big single-player DLC for Mass Effect 3," Gamble said. "It involves Commander Shepard and his crew basically chasing a rumor throughout the galaxy-this mysterious creature called Leviathan. The rumor is that Leviathan can actually take down a Reaper by himself and because of that, Commander Shepard gets swept up in this whirlwind, and he goes from planet to planet trying to seek out Leviathan."

Bioware also released new wallpaper to celebrate the announcement of the Leviathan DLC.